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Grand Seiko Take the Evolution 9 in a Sportier Direction with a Spring Drive GMT Complication - Oracle Time
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Grand Seiko's first mechanical complication combines a constant-force mechanism and a tourbillon as one unit on a single axis. | PRESS RELEASE | News | Grand Seiko
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Grand Seiko Take the Evolution 9 in a Sportier Direction with a Spring Drive GMT Complication - Oracle Time
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